| 1 | Pad character | Input | Char(1) |
| 2 | Number of bytes | Input | Binary(4) |
| 3 | Field ID | Input | Binary(4) |
| 4 | From row | Input | Binary(4) |
| 5 | From column | Input | Binary(4) |
| 6 | Command buffer handle | Input | Binary(4) |
| 7 | Low-level environment handle | Input | Binary(4) |
| 8 | Error code | I/O | Char(*) |
| Return code | Output | Binary(4) |
The Pad for N Positions (QsnWrtPad) API pads the display with the given pad character for the specified number of bytes. Padding starts at the row and column specified, or at the current display address if these parameters are omitted. To allow the QsnWrtPad operation to insert a group of characters without overwriting the ending screen attribute, the following conditions must be satisfied:
If the row and column parameters are omitted and the command is either a direct operation or the buffer specified does not contain a preceding output operation that sets the display address, then the current display address is set to row 1, column 1, prior to writing the pad characters.
If the from-row and from-column parameters are specified, this command corresponds indirectly to the 5250 Write to Display (WTD) command with a Set Buffer Address order. (For an indirect operation, a WTD is placed in the command buffer only if one does not already exist in the buffer.)
None
The same restrictions apply as for the Write Data (QsnWrtDta) API.
The pad character to pad the screen with.
The number of bytes to pad the screen for.
The field ID indicating the field at which to set the display address. If this parameter is specified with a nonzero value, the row and column parameters are ignored and the row and column values corresponding to the field ID are used to set the display address. If neither the field ID or row and column parameters are specified, the current display address is used.
The row at which to write the first pad character. The row parameter must refer to a row no greater than the current screen or window mode height (if window mode is enabled). The actual screen row used for a screen I/O operation is calculated using the formula base+offset=actual. The base is the row location of the top window border (0 for full screen) if offset is positive, or the row location of the bottom window border (screen height plus 1 for full screen) if offset is negative. The offset is the row parameter value specified, and actual is the actual screen row to be used. A CPFA307 error occurs if an incorrect row value is specified.
If both the from-row and from-column parameters are omitted, the pad characters are written starting at the current display address. If this is the case and the command is a direct operation, or the buffer specified does not contain a preceding output operation that sets the display address, the current display address is set to row 1, column 1, prior to writing the pad characters. Both the from-row and from-column parameters must be specified, or both parameters must be omitted.
The column at which to write the first pad character. The column parameter must refer to a column no greater than the current screen or window mode width (if window mode is on). The actual screen column used for a screen I/O operation is calculated using the formula base+offset=actual. The base is the column location of the left window border (0 for full screen) if offset is positive, or the column location of the center window border (screen width plus 1 for full screen) if offset is negative. The offset is the column parameter value specified, and actual is the actual screen column to be used. A CPFA307 error occurs if an incorrect column value is specified.
A handle for the command buffer in which to store the command. If this parameter is omitted or specified as 0, this is a direct operation and the pad characters are written to the screen at the current display address. Otherwise, this is an indirect operation and the command is stored in the command buffer without an I/O operation taking place.
The low-level environment that the operation applies to. If this parameter is omitted or given with a value of zero, the default low-level environment is used.
The structure in which to return error information. For the format of the structure, see Error Code Parameter. If this parameter is omitted, diagnostic and escape messages are issued to the application.
A return code indicating the result of the operation. The value returned will be 0 if the operation was successful, or -1 otherwise.
| Message ID | Error Message Text |
|---|---|
| CPF24B4 E | Severe error while addressing parameter list. |
| CPF3CF1 E | Error code parameter not valid. |
| CPF3CF2 E | Error(s) occurred during running of &1 API. |
| CPFA301 E | Command buffer is full. |
| CPFA303 E | Error occurred for screen I/O operation. |
| CPFA304 E | Data-stream error &1 reported for screen I/O operation. |
| CPFA305 E | Cannot add operation to command buffer. |
| CPFA307 E | Screen position &1, &2 outside of display or window area. |
| CPFA308 E | Attempt to write data past end of display. |
| CPFA31D E | Attempt to write outside of window area. |
| CPFA31E E | Required parameter &1 omitted. |
| CPFA331 E | Buffer handle incorrect. |
| CPFA333 E | Parameter &1 not positive integer value. |
| CPFA334 E | Low level environment handle incorrect. |
| CPFA335 E | Screen address parameter error. |
| CPFA33C E | Undefined field ID &1. |
| CPFA343 E | Output operation not done. |
| CPFA344 E | The file &2 in library &3 is not valid. |
| CPFA345 E | The invite active flag is not valid. |
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